I guess that, technically, the card seems to be available in the UK but - at 2.3 times the listed price on Adorama - I don't think I'd be rushing in to buy it!
On a slightly different note, I have been using an 8GB Flucard with my K-3 and found the website pretty unhelpful when it came to connecting the card to my desktop. The software leans very heavily towards allowing the card to function as a standalone accesspoint, which is fine if you are connecting via a laptop that is not connected to a LAN, but not useful if you are connecting via a desktop and an access point connected to an existing lan.
After a little back and forth, I did get the card to log on to an access point. The first issue was resolved when I realised that the card disconnected when the camera auto powered down. The problem then became how to discover the IP address it had been assigned so that I could open the web interface of the card. No, that doesn't appear on the cards status page.
My favourite network discovery tool for Android - Fing - helped out there and by entering the revealed address, in Firefox on my desktop, I could reach the cards web interface. Unfortunately, the card auto refreshes in order to reload the page in the format
http://flucard/home.html. Not very helpful since the result is that the cards interface appears briefly before refreshing and disappearing completely.
To work around this I re-enter the address in the format
http://192.168.1.108/home.html (your address will,of course, be different) and off we go. The web based interface is surprisingly responsive and I can review the files on the card from my desktop before downloading or deleting them straight to an archive folder.
A little bit more thought from the manufacturer would have been really great!!